Liquefied-air motor.



UNITED STATES PATENT OFFICE.

OSCAR PATRIO OSTERGREN, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE GENERAL LIQUID AIR AND REFRIGERATING COMPANY, OF NEW JERSEY.

LIQUEFIED-AIR MOTOR.

SPECIFICATION forming; part of Letters Patent N 0. 671,608, dated April 9, 1901.

Application filed February 13, 1899. Serial No. 705,427. (N mam.

T0 (ZZZ whom it may concern: 9 designates a filling-plug, and a check- Be it known that I, OSCAR PATRIO OSTER- valve. GREN, a citizen of the Kingdom of Sweden, When vaporization takes place within the and a resident of Brooklyn, Kings county, interior vessel and the vapor is not drawn 5 New York, have invented certain new and off for any other purpose, the said vapor lifts usefullmprovements in Liquefied-AirMotors, the check-valve 10 and passes into the space of which the following is a specification. 7. From thence it percolates through the My invention relates to improvements in porous casing 6 and tends to hold back the liquefied-air motors, and particularly to the warmer air in the space 8, which has become 10 use of same in connection with rotating fanheated by its contact with the exterior vessel blades. 5, which derives its heat from the heat of the My invention consists of the provision of a atmosphere. novel and efficient form of vaporizer used in 11 designates a blow-off valve set to blow connection with a reservoir for containing olf at any predetermined pressure-such, for 15 the liquefied air or other fluid employed, in instance, at two pounds per square inch above the provision of suitable means for utilizing atmospheric pressure. the vaporized gas or air for a motive fluid, in 12 designates a vaporizer, here shown as the combination of these elements with fancomprising a coil, 13, which is connected at blades, and in providing a discharge-opening one of its ends with the interior of the interior 20 for the vaporized gas or air after it has passed vessel 4 of the reservoir 3 at a point below the the motor in advance of the fan-blades. level of the liquid therein, preferably at the The objects of my invention are the praclowestpoint thereof, and a return-coil 14, contical utilization of liquefied air or other gas as nected with the interior vessel 4 at a point a motive fluid, particularly for operating a above the level of the liquid therein. The 25 rotary fan, and the utilization of the dislower ends of the two are connected together, charged cold air for cooling purposes, in comas shown at 15, and the coil 13 is provided bination with the said rotary fan. with astop-valve 16. The form of valve pref- I will now proceed to describe adevice emerably used is shown in detail in Fig. 2 and bodying myinvention and will then point out comprises a shell or valve-casing, a screw- 0 the novel features in claims. threaded valve-stem and hand-wheel, and a Figure 1 represents a central vertical secconical valve secured thereto. The valvetion of a reservoir, a vaporizer, an air-motor, stem is suitably packed, as shown.

and fan-blades constituting my invention. 17 designatesa third coil which is connected Figs. 2 and 3 are details. to the upper end of the return-coil 14, or, as

5 Similar reference characters designate corshown, to the interior of the reservoir at a responding parts in all the figures. point above the level of the liquid. The coil Reference-numeral 3 designates a recep- 17 is also provided with a stop-valve l8, simitacle or reservoir containing the liquefied air lar-to the valve 16 in the coil 13. The detail or other gas employed. This reservoir may View Fig. 2 shows the preferred form of these 40 be of any desired form and may be protected valves; but such construction is not essential. 0 from the heat of the atmosphere by any de- In this figure, 22 is a cone-shaped valve and 23 sired means. In this reservoir, 4designates its seat. This valve has a stem 24, which is an interior vessel and 5 an exterior vessel. screw-threaded to turn in the interior thread A casing 6, of porous material, such as porous of plug 25, which in its turn is screw-threaded 45 carbon, is arranged between the two vessels, to screw in the coupling 26. At its upper end as shown, but is of such dimensions and is so plug 25 is also screw-threaded to receive the arranged as to leave a space 7 between the cap 27, which forms a stuffing-box about the said casing and the interior vessel and a space valve-stem 24. The valve-stem has a handle 8 between the said casing and the exterior 28, which can be turned to move it to and 50 vessel. from its seat. The lower end of the coil 17 mo .connects with an air or gas motor, here shown as a turbine 19. (See also detail Fig. 3.)

2O 20 designate fan-blades rotated bythe action of the turbine 19. The discharge or exhaust from the turbine is arranged in ad- Vance of the fan-blades, as shown, so that the said fan-blades in their rotation will drive the cold air so discharged downwardly, and thus circulate same and use same for cooling purposes.

The action of the apparatus is as follows: Valves 16 18 being open, liquid air, by gravity, will pass down the coil 13 and will start to vaporize by absorbing heat from the atmosphere. The products of such vaporization will rise up the return-coil 14 back into the upper end of the interior vessel 4. From thence they will pass down the third coil 17 into the turbine-channels 19. The turbine will thus be rotated and is arranged to carry the fan-blades with it. The cold exhaust-air is discharged in advance of the fan-blades and is thus used for cooling purposes.

21 designates a suitable lubricating device.

Should the pressure in the vaporizer become too high or should the valve 16 be accidentally opened and the valve 18 kept closed, the blow-off valve 11 will act as a safety-valve.

What I claim is- 1. The combination with a reservoir for containing liquefied air or other gas of a coil connected at one of its ends with the reservoir below the level of the liquid therein, a return-coil parallel with the first coil, the two said coils being connected together at their turn-coil, substantially as specified.

2. The combination with a reservoir for containing liquefied air or other gas, of a coil connected at one of its ends with the reservoir below the level of the liquid therein and at the other of its ends .with the reservoir above the level of the liquid therein, of an air or gas operated motor, and a connection between said motor and the said reservoir above the level of the liquid therein, substantially as specified,

3. The combination with a reservoir for containing liquefied air or other gas, of three coils arranged below the said reservoir, one

of said coils connected with the said reservoir below the level of the liquid therein, the other two of said coils connected with the said reservoir above the level of the liquid therein, the first mentioned of said coils connected at its lower end with the lower end of one of the said second-mentioned coils, and an air or gas operated motor with which the lower end of the other of said second-mentioned coils is connected, substantially as specified.

4. The combination with a reservoir for containing liquefied air or other gas, of three coils arranged below the said reservoir, one of said coils connected with the said reservoir below the level of the liquid therein, the other two of said coils connected withthe said reservoir above the level of the liquid therein, the first mentioned of said coils connected at its lower end with the lower end of one of the said second-mentioned coils, a turbine with which the lower end of the other of said second-mentioned coils is connected, fan-blades secured to said turbine and a discharge for said turbine in advanceof said fan-blades sub- 1 stantially as specified.

Signed by me at New York, N. Y., this 10th day of February, l899. OSCAR PATRIO OSTERGREN.

Witnesses:

JNo. S. PARKER,

CHARLOTTE F. QARRINGTON. 

